1. Center for Biologics Evaluation and Research, Food and Drug Administration Bethesda, Maryland, USA
2. Meade Biologics, Hillsborough, North Carolina, USA
3. Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, USA
4. U.S. Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, Maryland, USA